iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Jobs: Software Update to Address iOS 4 Performance Issues on iPhone 3G 'Coming Soon'
A new email from Apple CEO Steve Jobs appears to confirm that the company will soon be issuing a software update to address issues with the iPhone 3G's performance under iOS 4. Late last month, the company acknowledged that it was "looking into" user reports of the issues.
The new email came in response to feedback sent by a customer who expressed frustration over the performance of his iPhone 3G, calling it "dog slow" and pointing to problems with system responsiveness when scrolling, zooming, and typing.
I've waited patiently through 4.0.1 and 4.0.2, looking for a fix that will make my phone work again. I've read the forums that advise me to jailbreak my phone or use some other method so I can downgrade back to a version of iPhone 3, however I'm not prepared to use a method that is not supported by Apple.Jobs' response was unsurprisingly terse:
Software update coming soon.
Sent from my iPhone